Rev counter repair and Clock ideas

[Nick Challacombe]

My rev counter has ceased to function, I stupidly thought that it was cable driven but it is electronic. Has anybody had one repaired? If so could you point me in the right direction.?
I have had my clock repaired twice in the last 26 years and it again is only correct twice a day. Has anyone ever managed to replace their clock with a more reliable one?
Thank you.